Hey Paul, depending on the mods...$95-190. We just tuned a completely stock (includin air box) SRT8 GC and picked up 3-4 tenths at the track. Sorry it took me so long to reply...we just finished moving to a new shop in Va. Beach. If you're interested shoot Brent a call at (757) 549-3966 Xt2
Just be careful on the dyno if its not AWD you need to totally disengage the transfer case motor if its RWD dyno.
Shouldn't even need to put it on the dyno...we've tuned many different combinations, so we have some good tune files.